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mybatis分页拦截器报错：

org.apache.ibatis.exceptions.PersistenceException: 
### Error opening session.  Cause: org.apache.ibatis.plugin.PluginException: Could not find method on interface org.apache.ibatis.executor.statement.StatementHandler named prepare. Cause: java.lang.NoSuchMethodException: org.apache.ibatis.executor.statement.StatementHandler.prepare(java.sql.Connection)
### Cause: org.apache.ibatis.plugin.PluginException: Could not find method on interface org.apache.ibatis.executor.statement.StatementHandler named prepare. Cause: java.lang.NoSuchMethodException: org.apache.ibatis.executor.statement.StatementHandler.prepare(java.sql.Connection)

	at org.apache.ibatis.exceptions.ExceptionFactory.wrapException(ExceptionFactory.java:30)
	at org.apache.ibatis.session.defaults.DefaultSqlSessionFactory.openSessionFromDataSource(DefaultSqlSessionFactory.java:100)
	at org.apache.ibatis.session.defaults.DefaultSqlSessionFactory.openSession(DefaultSqlSessionFactory.java:57)
	at org.mybatis.spring.SqlSessionUtils.getSqlSession(SqlSessionUtils.java:98)
	at org.mybatis.spring.SqlSessionTemplate$SqlSessionInterceptor.invoke(SqlSessionTemplate.java:428)
	at com.sun.proxy.$Proxy53.selectList(Unknown Source)
	at org.mybatis.spring.SqlSessionTemplate.selectList(SqlSessionTemplate.java:230)
	at org.apache.ibatis.binding.MapperMethod.executeForMany(MapperMethod.java:147)
	at org.apache.ibatis.binding.MapperMethod.execute(MapperMethod.java:80)
	at org.apache.ibatis.binding.MapperProxy.invoke(MapperProxy.java:58)
	at com.sun.proxy.$Proxy54.findSystemUsers(Unknown Source)
	at com.husy.service.impl.SystemUserServiceImpl.findSystemUsers(SystemUserServiceImpl.java:37)
	at com.husy.SpringbootMybatiesApplicationTests.findUsers(SpringbootMybatiesApplicationTests.java:35)
	at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
	at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:62)
	at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
	at java.lang.reflect.Method.invoke(Method.java:498)
	at org.junit.runners.model.FrameworkMethod$1.runReflectiveCall(FrameworkMethod.java:50)
	at org.junit.internal.runners.model.ReflectiveCallable.run(ReflectiveCallable.java:12)
	at org.junit.runners.model.FrameworkMethod.invokeExplosively(FrameworkMethod.java:47)
	at org.junit.internal.runners.statements.InvokeMethod.evaluate(InvokeMethod.java:17)
	at org.springframework.test.context.junit4.statements.RunBeforeTestExecutionCallbacks.evaluate(RunBeforeTestExecutionCallbacks.java:74)
	at org.springframework.test.context.junit4.statements.RunAfterTestExecutionCallbacks.evaluate(RunAfterTestExecutionCallbacks.java:84)
	at org.springframework.test.context.junit4.statements.RunBeforeTestMethodCallbacks.evaluate(RunBeforeTestMethodCallbacks.java:75)
	at org.springframework.test.context.junit4.statements.RunAfterTestMethodCallbacks.evaluate(RunAfterTestMethodCallbacks.java:86)
	at org.springframework.test.context.junit4.statements.SpringRepeat.evaluate(SpringRepeat.java:84)
	at org.junit.runners.ParentRunner.runLeaf(ParentRunner.java:325)
	at org.springframework.test.context.junit4.SpringJUnit4ClassRunner.runChild(SpringJUnit4ClassRunner.java:251)
	at org.springframework.test.context.junit4.SpringJUnit4ClassRunner.runChild(SpringJUnit4ClassRunner.java:97)
	at org.junit.runners.ParentRunner$3.run(ParentRunner.java:290)
	at org.junit.runners.ParentRunner$1.schedule(ParentRunner.java:71)
	at org.junit.runners.ParentRunner.runChildren(ParentRunner.java:288)
	at org.junit.runners.ParentRunner.access$000(ParentRunner.java:58)
	at org.junit.runners.ParentRunner$2.evaluate(ParentRunner.java:268)
	at org.springframework.test.context.junit4.statements.RunBeforeTestClassCallbacks.evaluate(RunBeforeTestClassCallbacks.java:61)
	at org.springframework.test.context.junit4.statements.RunAfterTestClassCallbacks.evaluate(RunAfterTestClassCallbacks.java:70)
	at org.junit.runners.ParentRunner.run(ParentRunner.java:363)
	at org.springframework.test.context.junit4.SpringJUnit4ClassRunner.run(SpringJUnit4ClassRunner.java:190)
	at org.junit.runner.JUnitCore.run(JUnitCore.java:137)
	at com.intellij.junit4.JUnit4IdeaTestRunner.startRunnerWithArgs(JUnit4IdeaTestRunner.java:68)
	at com.intellij.rt.execution.junit.IdeaTestRunner$Repeater.startRunnerWithArgs(IdeaTestRunner.java:47)
	at com.intellij.rt.execution.junit.JUnitStarter.prepareStreamsAndStart(JUnitStarter.java:242)
	at com.intellij.rt.execution.junit.JUnitStarter.main(JUnitStarter.java:70)
Caused by: org.apache.ibatis.plugin.PluginException: Could not find method on interface org.apache.ibatis.executor.statement.StatementHandler named prepare. Cause: java.lang.NoSuchMethodException: org.apache.ibatis.executor.statement.StatementHandler.prepare(java.sql.Connection)
	at org.apache.ibatis.plugin.Plugin.getSignatureMap(Plugin.java:83)
	at org.apache.ibatis.plugin.Plugin.wrap(Plugin.java:44)
	at com.husy.interceptor.PageInterceptor.plugin(PageInterceptor.java:67)
	at org.apache.ibatis.plugin.InterceptorChain.pluginAll(InterceptorChain.java:31)
	at org.apache.ibatis.session.Configuration.newExecutor(Configuration.java:599)
	at org.apache.ibatis.session.defaults.DefaultSqlSessionFactory.openSessionFromDataSource(DefaultSqlSessionFactory.java:96)
	... 41 more
Caused by: java.lang.NoSuchMethodException: org.apache.ibatis.executor.statement.StatementHandler.prepare(java.sql.Connection)
	at java.lang.Class.getMethod(Class.java:1786)
	at org.apache.ibatis.plugin.Plugin.getSignatureMap(Plugin.java:80)
	... 46 more

我的配置如下：

@Intercepts({
		 @Signature(method = "prepare", type = StatementHandler.class, args = { Connection.class })
		,@Signature(type = Executor.class, method = "query", args = {MappedStatement.class, Object.class, RowBounds.class, ResultHandler.class})
})
@Component
public class PageInterceptor  implements Interceptor {
		...
}

这是什么问题呢？ 我们发现 StatementHandler 源码如下：

public interface StatementHandler {
    Statement prepare(Connection var1, Integer var2) throws SQLException;

    void parameterize(Statement var1) throws SQLException;

    void batch(Statement var1) throws SQLException;

    int update(Statement var1) throws SQLException;

    <E> List<E> query(Statement var1, ResultHandler var2) throws SQLException;

    <E> Cursor<E> queryCursor(Statement var1) throws SQLException;

    BoundSql getBoundSql();

    ParameterHandler getParameterHandler();
}

发现没? prepare 方法有两个参数。而我的配置只有一个参数，这显然不正确。

修改如下：

@Signature(method = "prepare", type = StatementHandler.class, args = { Connection.class,Integer.class})

ok 问题解决。

总结：这个问题应该是mybatis版本更新了， 在3.40之前的版本是没有这个参数的。所以直接从网上拷贝的代码并不可用。